Permanently pliable and adhesive compound fro insulating and other purposes.



, nosssr L, JOHNSTONE, or

GLENRIDGE, new J RSEY,

rrnmmranv PLIA'IBLE AND ADHESIVE COMPOUND FOR msumme ANDOTHER PURPOSES.

No. seaeio.

Specification of Letters Patent;

Patented pet, 9, race,

Application an May t, 1903. R0newed llaroh 9,-19OB- an in. 30S,180. v v I roan whom it may concern:

Be it known that I, Ronna'r L. J OHN-STON-E, a citizen of the United States, residing in Glenridge, county of Essex, State of New J ersey,

have invented certain new and useful Improvements in Permanently iPliable and Adesive Compounds for Insulating and other Purposes, of which the following is a specification.

The object of this invention is to produce a compound specially adapted. for uses in the .tions of temperature.

arts which require great adhesiveness and cohesiveness with permanent flexibility, as in the insulation of electric wires having short bends, in the preparation of adhesive plasters, and the like, and in other like instances. For such uses the compound em ployed should not only have the particular degree of adhesiveness required, but that the flexibility of the compound may not decrease with time by reason of the drying out or oxidation of the substance the compound must be practically non-oxidizable, neutral to all substances to the action of which it is likely to be subjected; free from all'volatile constituents, and in all other res ects practically unohangeable under all or inary condi- At the same time its; fusing-point should not be so high as to make it impracticable to a ply the com ound to the purposes for whic it is intende It has been found that a compound which answers in a marked degree all oftheserequirements may be produced by combining what is known in the arts as gutta-percha gum, or, more accurately, the resin of the gutta-percha of commerce, as distinguished from crude guttaercha, with a'wax which has a com arative y'high melting-point. As:

j is well un erstood by those skilled in the use of gutta-percha, gutta-percha resin is va soft sticky substance which remains'perinanently soft and sticky at a normal temperature and melts at a temperature but slightly above the normal. This substance, therefore, .pos sesses some of the characteristics necessary to the production of the desired compound; but with it must be combined some other substance which shall raise the melting-point of the compound above that of the uttapercha resin, shall give the necessary egree of hardness or. body to the compound, and shall enhance rather than diminish the desirable qualities of thegutta-percha resin.

Such a substa cs is substance of resinous or waxy it s believed that the best results are producedwith a vegetable 'wax, and particuar'l with a vegetable wax known u'on the mar et as carnauba-Wax or razil wax, obtained from the Brazilian wax palm. This wax melts only at a temperature very much above the normal,

a m proaching 400 Fahrenheit. Consequently when the gutta-percha'resin and this war:

have been melted together and combined the resulting compound has a melting-point considerably above that of the gutta-percha resin alone, but otherwise retains the des1rable characteristics of such resin, the adhe siveness and pliabilit of the compound being even greater than t at of the gutta-percha resin alone. :Furthermore, the compound does not harden from exposure to the air, but retains its softness and flexibility, as well as its tenacity. The consistency of the compound-l ma. be varied accordin to therequirements of t e different uses to wliich it is'put by varying the proportion of, the ingredients.-

In practice the quantity of wax in the comound varies from about ten ercentum to ty percentum of the whole, t e larger percentum of wax making the compound firmer and adapting it particularly for use as an insulating compound for short-bend insulation,

while the smaller percentum of wax makes the compound more suitable for use in an adhesive laster or for other like purposes. a

- It will he understood that not only can the proportions of the ingredients be varied for different results according to the intended use of thecompound, but that the compound v is capable of use either by itself or in combination with other materials, also according to the intended use.

i I claim as my invention- 1. A permanently pliable and adhesive compound consisting of gutta-percha resin and a waxy substance having a relatively high melting-point.

2. A permanently pliable adhesive compound consisting of guttaercha resin and a vegetable wax having a re atively high melting-point.

3.- A permanenl pliable adhesive com: pound consisting o gutta-percha-resin and carnauba-wax. I

This specification signed and witnessed this 12th day of May, A. D. 1903. i

, ROBERT, L. J OHNSTONE.

In presence of- 1 Anrnonr N. JESBERA, 

